My notion of a fair workplace is one where people's pay and rewards are entirely determined by their skill and merit, as judged by the management.
But lots of other people and especially unions define it totally differently: one where people's pay is determined by tenure, their union contract or their gender/race. That seems to be what these Kickstarter employees want.
Without a clear definition the word 'fair' can be interpreted as having polar opposite meanings.
It is important to remember that economic coerciveness is a result of overwhelming scale and bargaining power of one party over another. Kickstarter is a 100-ish headcount company located in Brooklyn, NY. This is hardly a captive employee pool compared to say, factory workers in a small town whose entire economy is centered around that one factory.
If Kickstarter workers unionize, I don't not believe it will results in two sides with equal bargaining power, Kickstarter will be in a substantially weaker position. If Kickstarter refuses the offer, all function ceases. If the workers refuses the offer, they have the robust job market of Brooklyn NY to fall back on.
That's not competition, that's just giving away public money.